Ultraviolet water sterilizer for hot tubs, swimming pools and spas



FIG. 1 is a perspective view of the design;

FIG. 2 is a left end view of the design, the right end view being a mirror image thereof;

FIG. 3 is a top view of the design;

FIG. 4 is a rear view of the design;

FIG. 5 is a bottom view of the design; and,

FIG. 6 is a front view of the design. 

The ornamental design for an ultraviolet water sterilizer for hot tubs, swimming pools and spas, as shown and described. 